From Rank 1 to not being indexed??! What is wrong?

Hi, this is my first post and first af all i have to thank this forum for giving me so much hints and support!! Great work!

I am running a view (niche) blogs which are running well. One of them is my cash-cow but since end of october the visitors decreased from 1200 per day to 200!?

Last weekend where an Up again, running 1700 visitors a day, giving my great earnings. But then, Monday - again 200...and still since this day...

I have no clue what is going on. Funny i checked the visitor numbers of the last month and there were ~1000 every day, not more or less - still araund 1000 visitors.

Now i am thinking that my provider is cutting of the traffic!? But on the other hand i have no idea why my page is not indexed at all for my main keyword. It has been No. 1 since January (and back on the last weekend)!

Do anyone of you have any clue what is going on here?! what do i have to reconfigure or check concerning google?!

Did you do linkbuilding. If you did some xrumer/scrapebox etc blast than you need to wait till google calculates your ranking and than places you there. Until than you are gonna be fluctuating randomly.

Well the page is about 13 months - and had growing visitor-numbers. So still I have no idea what makes it go down!?
I did some backlinking some time ago, maybe I have to renew it?
I haven't used the tools you mentioned - only because i am in germany. I have no idea if the backlinking-tools would work at all at this place.

Who has an idea what is going on with my blog?! Every idea is appreciated!!

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